DocumentCode :
3455927
Title :
Iterative correction of frequency response mismatches in time-interleaved ADCs: A novel framework and case study in OFDM systems
Author :
Tsui, K.M. ; Chan, S.C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
fYear :
2010
fDate :
21-23 June 2010
Firstpage :
253
Lastpage :
258
Abstract :
In this paper, we study a versatile iterative framework for the correction of frequency response mismatch in time-interleaved ADCs. Based on a general time varying linear system model, we establish a flexible iterative framework, which enables the development of various efficient iterative correction algorithms. In particular, we study the Gauss-Seidel iteration in detail to illustrate how the correction problem can be solved iteratively, and show that the iterative structure can be efficiently implemented using Farrow-based variable digital filters with few general-purpose multipliers. Simulation results show that the proposed iterative structure performs better than conventional compensation structures. Moreover, a preliminary study on the BER performance of OFDM systems due to TI ADC mismatch is conducted.
Keywords :
OFDM modulation; analogue-digital conversion; digital filters; error statistics; iterative methods; radiocommunication; BER performance; Farrow-based variable digital filters; Gauss-Seidel iteration; OFDM systems; analog-to-digital converters; frequency response mismatches; iterative correction; time-interleaved ADC; wireless communication systems; Analog-digital conversion; Digital filters; Frequency response; Gaussian processes; Iterative methods; Linear systems; Modems; OFDM; Sampling methods; Time varying systems; Farrow structures; Frequency response mismatch; Iterative methods; OFDM; Time-interleaved analog-to-digital converters; Variable digital filters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Green Circuits and Systems (ICGCS), 2010 International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-6876-8
Electronic_ISBN :
978-1-4244-6877-5
Type :
conf
DOI :
10.1109/ICGCS.2010.5543057
Filename :
5543057
Link To Document :
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